Regulator for gas and air mixers



E. G. OFELDT.

REGULATOR FOR GAS AND AIR MIXERS. APPLICATION FILED JUNE 7. I9I9.

1,316,504. Patmedsepn 16, 1919.

mmmlmi j Eff.

"lil Il IIII Il Il j /NI/ENTOR Alfomeys ERNEST Gr. OFELD'I, OF NYACK,NEW YORK.

REGULATOR FOR GAS AND AIR MIXERS.

Specification of Letters Patent.

Patented Sept. 1.6, 1919.

Application filed `Tune 7, 1919. Serial No. 302,527.

To zZ-Z whom t may concern.'

Be it known that I, ERNEST G. OEELDT, a citizen of the United States,a-nd a resident of Nyack-on-the-Hudson, in the county of Rockland andState of New York, have invented certain new and useful Improvements inRegulators for Air and Gas Mixers; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to improvements'in regulators for air and gasmixers, such as employed with burners, especially those of the Bunsentype,-one object of the invention being to provide simple and efiicientautomatically operable means whereby the iniow of air to the mixingchamber proper proportion to the gas entering said chamber shall beinsured.

With this and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a sectional view illustratingan embodiment of my invention; Fig. 2 is a view in elevation, and Fig. 3is a sectional view on the line 3 3 of Fig. 1. i

1 represents a casing providing a mixing chamber 2 and extensions 3 and4 of said mixing chamber,-the extension 3 having a rearward port 5 andthe extension 4 having a forward port 6.

A nipple 7 passes through the rear wall of the casing and is adapted forthe reception of a gas pipe from a suitable source of supply. A burnermixing tube 8 is connected with the casing 1 in line with the gas supplyinlet nipple 7 and communicates with the mixing chamber 2.

An overbalanced butterfly valve 9 is disposed within the casing betweenthe gas inlet nipple 7 and the mixing tube 8 and is pivotally .supportedcentrally between its ends. The valve 9 may be made of comparativelythin metal provided at diametrically opposite edges with bosses 10 whichare offset *to one side of the valve and mounted on screws or pintles 11passing through walls of the casing 1. By providing the hinge or pivotalmounting for the buttery valve so that it will be oifset from one faceof the valve at the center of the latter', said yalve will be sooverbalanced when disposed 111v an Vupright position that it will tendto turn in a direction toward the parts of the casing in which the ports5 and 6 are located and to abut against these portions of the casing,thus normally closing said ports.

The valve 9 is provided with a central opening 12 to permit vthe gas toflow from the nipple 7 through said valve and through the mixing chamberto the mixing tube.

Normally, when no gas is lflowing through the nipple 7, the slightlyoverbalanced butterfly valve 9 will be in position to close the airports 5 and 6. When gas is permitted to flow from the nipple, throughthe valve and mixing chamber to the mixing tube, a suction will becreated in the extensions of the mixing chamber, especiallyv in upperextension 3, and operate to move the valve on its pivotal mounting and'open the air ports 5 and 6,-thus admitting air to the mixing chamber andpermitting some of the air so admitted to flow with the gas through theopening in the valve and other portions to pass into the mixing chamberin front of the valve. The degree of opening of the air valve will be indirect proportion to the quantity of gas passing through the device, andhence the admission of air in proper proportion to the gas passing tothe burner will be automatically controlled by the automatic operationof said valve.

Various changes might be made in the details of construction of myinvention without departing from the spirit thereof or limiting itsscope and hence I do not wish to restrict myself to the precise detailsherein set forth.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. In a device of the character described, the combination with a casingproviding a mixing chamber and provided with a gas inlet and air inletports. and with a gas and air outlet. of an overbalanced butterfly valvepivotally mounted between its ends intermediate of the gas inlet and thegas and air outlet and between the air inlet ports and operableautomatically to control the inflow of air through said air inlet portsin proportion to the gas entering through the gas inlet. y

2. In a device of the character described, the combination withA acasing providing a mixing chamber and two air inlet ports, said easinghaving a gas inlet and a gas and air outlet opposite the gas inlet andcommunicating with the mixing chamber, of a. butterfly valve pivotallymounted Centrally between its ends within said casing between the gasinlet and the gas and air outlet and having a central opening in linewith the gas inlet, the pivotal mounting of said valve being offset fromone face thereof, and said valve being operable automatically to controlthe inflow of air through both of said air inlet ports.

3. In a device of the character described, the combination with a easingproviding 'a mixing chamber having upper and lower extensions, saidupper extension having a rearward air port and said lower eXtensionhaving a forward air port, said casing operable automatically to controlthe inflow of air through both of said air ports in proportion to thequantity oi" gas entering through said gas inlet.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

, ERNEST Gr. OFELDT. l/Vitnesses:

M. U. BRYANT, WALTER LAKE.

Copies of this patent Amay be obtained for five `cents each, byaddressing the Commissioner of Patents. Washington, D. C.

